# Counties in Michigan by median age on 1 July (US county estimates), 2025

All 83 values come from U.S. Census Bureau for 2025, so the places are comparable.

- Indicator id: `median_age_pep`
- Unit: years
- Definition: Age that divides the resident population of a US county into two halves of equal size on 1 July, from Census Bureau population estimates calculated by single year of age.
- Source: U.S. Census Bureau, Population Estimates Program, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage (https://www.census.gov/programs-surveys/popest/data/data-sets.html)
- Publisher page: https://invokely.ai/en/publishers/us-census-bureau
- Retrieved: 2026-10-12
- Citation: U.S. Census Bureau. Population Estimates Program, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.
- Web page: https://invokely.ai/rankings/median-age-july-1-us-counties/michigan-counties

| Rank | Place | years |
|---:|---|---:|
| 1 | Ontonagon County | 60.1 |
| 2 | Alcona County | 59 |
| 3 | Roscommon County | 57.8 |
| 4 | Keweenaw County | 57.1 |
| 4 | Montmorency County | 57.1 |
| 6 | Presque Isle County | 56.4 |
| 7 | Leelanau County | 56.3 |
| 8 | Iosco County | 53.9 |
| 8 | Iron County | 53.9 |
| 8 | Schoolcraft County | 53.9 |
| 11 | Mackinac County | 53.4 |
| 12 | Oscoda County | 53.1 |
| 13 | Lake County | 52.4 |
| 14 | Antrim County | 52.1 |
| 15 | Benzie County | 51.8 |
| 16 | Cheboygan County | 51.6 |
| 17 | Gogebic County | 51.3 |
| 18 | Charlevoix County | 51.2 |
| 19 | Ogemaw County | 51.1 |
| 20 | Gladwin County | 51 |
| 21 | Arenac County | 50.8 |
| 22 | Manistee County | 50.6 |
| 23 | Crawford County | 50.3 |
| 24 | Menominee County | 50 |
| 25 | Huron County | 49.9 |
| 26 | Alger County | 49.3 |
| 27 | Clare County | 48.9 |
| 28 | Emmet County | 48.4 |
| 29 | Mason County | 48.3 |
| 30 | Delta County | 48 |
| 31 | Alpena County | 47.3 |
| 32 | Dickinson County | 46.7 |
| 33 | Baraga County | 46.2 |
| 34 | Luce County | 46.1 |
| 35 | Kalkaska County | 45.9 |
| 35 | Sanilac County | 45.9 |
| 37 | Cass County | 45.3 |
| 38 | Tuscola County | 45.1 |
| 39 | Otsego County | 45 |
| 40 | Lapeer County | 44.9 |
| 40 | Oceana County | 44.9 |
| 42 | St. Clair County | 44.8 |
| 43 | Bay County | 44.7 |
| 43 | Livingston County | 44.7 |
| 45 | Grand Traverse County | 44.6 |
| 46 | Missaukee County | 44 |
| 47 | Berrien County | 43.8 |
| 48 | Osceola County | 43.6 |
| 49 | Newaygo County | 43.4 |
| 49 | Shiawassee County | 43.4 |
| 51 | Barry County | 43.3 |
| 51 | Lenawee County | 43.3 |
| 53 | Monroe County | 43.2 |
| 54 | Gratiot County | 42.9 |
| 55 | Van Buren County | 42.7 |
| 56 | Hillsdale County | 42.6 |
| 56 | Midland County | 42.6 |
| 56 | Wexford County | 42.6 |
| 59 | Saginaw County | 42.3 |
| 60 | Chippewa County | 42 |
| 61 | Clinton County | 41.9 |
| 61 | Eaton County | 41.9 |
| 61 | Jackson County | 41.9 |
| 64 | Oakland County | 41.7 |
| 65 | Macomb County | 41.6 |
| 66 | Allegan County | 41.5 |
| 67 | Genesee County | 41.3 |
| 68 | Montcalm County | 41.2 |
| 69 | Branch County | 41 |
| 69 | Muskegon County | 41 |
| 71 | Calhoun County | 40.7 |
| 72 | St. Joseph County | 40.3 |
| 73 | Ionia County | 40.2 |
| 74 | Marquette County | 40 |
| 74 | Mecosta County | 40 |
| 76 | Wayne County | 38.3 |
| 77 | Ottawa County | 37.5 |
| 78 | Kent County | 36.6 |
| 79 | Kalamazoo County | 36.5 |
| 80 | Washtenaw County | 36.3 |
| 81 | Ingham County | 33.6 |
| 82 | Houghton County | 32.7 |
| 83 | Isabella County | 30.4 |